[mapserver-dev] Mapserver thread safety

[Umberto Nicoletti]

FYI, I've opened this pull request which should fix the Oracle spatial
issue you are seeing:
https://github.com/mapserver/mapserver/pull/4729
Let me know if it works for you.

BR,
Umberto

On Tue, Aug 13, 2013 at 8:23 AM, Umberto Nicoletti <
umberto.nicoletti at gmail.com> wrote:

> Michel,
> this page attempts to keep track of which Mapserver components are thread
> safe:
>
> http://mapserver.org/faq.html#is-mapserver-thread-safe
>
> it must not be completely up to date as, as you found out, Oracle is
> listed as safe, while it's not.
> As for fixing it, it should be relatively easy as those two variables can
> be made local to the functions using them.
>
> Please open an issue and I will look into it asap.
>
> Umberto
>
>
>
> On Mon, Aug 12, 2013 at 9:44 PM, <Michel.Dastous at bentley.com> wrote:
>
>>  Hi all,
>>
>> I’ve been testing mapserver and its c# mapscript API for a while now, and
>> I have noticed that making simultaneous Draw request on multiple maps
>> containing Oracle layer will end up in memory corruption.  No surprise here
>> since maporaclespatial.c uses static variables (ordinates_tdo and
>> ordinates).
>>
>> My question is: Does anyone have already evaluated how much work it would
>> require to make it thread safe (i.e remove those static variables from the
>> code) ?
>>
>> Furthermore, I have also tested the MSSQL plugin which is stable under
>> same conditions, unfortunately it doesn’t seem to scale very well my 4 core
>> machines with maximum CPU usage of 15%.
>>
>> I don’t think the problem come from mapserver’ s rendering engine… when
>> drawing a map with inlined data, I could easily reach a 90% usage.
>>
>> So any suggestions/information would be welcome.
>>
>> Thanks.
>>
>>
>> _______________________________________________
>> mapserver-dev mailing list
>> mapserver-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-dev
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-dev/attachments/20130813/259c39db/attachment.html>